F 150 2WD V8-4.6L VIN W (2007)
Brake Light Switch: Description and Operation
BRAKE PEDAL POSITION (BPP) SWITCH
Typical BPP Switch
The BPP switch is sometimes referred to stoplamp switch. The BPP switch provides a signal to the PCM indicating that the brakes are applied. The BPP
switch is normally open and is mounted on the brake pedal support. Depending on the vehicle application the BPP switch can be hardwired as follows:
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to the PCM supplying battery positive voltage (B+) when the vehicle brake pedal is applied.
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to the anti-lock brake system (ABS) module, or lighting control module (LCM), the BPP signal is then broadcast over the network to be received
by the PCM.
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to the ABS traction control/stability assist module. The ABS module interprets the BPP switch input along with other ABS inputs and generates an
output called the driver brake application (DBA) signal. The DBA signal is then sent to the PCM and to other BPP signal users.
